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A New Method for Detecting Goaf Area of Coal Mine :2D

The 2D microtremor profiling technique can be applied to effectively locate the discarded goaves and their associated fracturing and caving zones The reliability of the goaf detection method has been validated by previous drilling data Undoubtedly the 2D microtremor profiling technique provides us a new geophysical method for goaf detection Get price

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Coal Exploration and Geophysical Logging with Insitu

Accurate coal quality determinations for mining purposes can be determined from the geophysical logs once a minimum assay profile has been generated When I was working on B C Hydro's Hat Creek coal deposit I came up with the idea that the deposit might be amenable to a method of mining that I referred to as Insitu Analysis and Selective Mining Get price

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CN104198539A

The invention relates to a method for detecting and evaluating a grouting reinforcement effect of a seam floor The method comprises the following steps: 10 drawing a before-grouting seam floor contrast base map 20 guiding the construction of grouting holes by using the before-grouting seam floor contrast base map 30 establishing a model Get price

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geophysical method for coal exploration

geophysical method for coal exploration Home / geophysical method for coal exploration Geophysical Methods of Exploration Geophysical methods of exploration are means to collect geophysical data that can be Geophysical methods of exploration are means to collect coal base and Mais de 100 100+ Comentrios Get price

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geophysical methode for detecting coal

geophysical methode for detecting coal SURFACE GEOPHYSICAL METHODS FOR DETECTION OF workings at a depth of 50 – 100 feet or greater the seismic reflection method especially with the use of S-waves has plied in the detection of coal mine voids Get price

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Exploration geophysics

Exploration geophysics is also used to map the subsurface structure of a region to elucidate the underlying structures spatial distribution of rock units and to detect structures such as faults folds and intrusive rocks This is an indirect method for assessing the Get price

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GEOPHYSICAL METHODS IN EXPLORATION AND MINERAL

GEOPHYSICAL METHODS IN EXPLORATION AND MINERAL ENVIRONMENTAL INVESTIGATIONS by Donald B Hoover Douglas P Klein and David C Campbell INTRODUCTION In the following discussion the applicability of geophysical methods to geoenvironmental studies of ore deposits is Get price

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Detection of abandoned underground coal mines by

Drilling is the only known method for accurately determining the coal mines Airborne infrared radiometry proved to be an excellent tool for detecting and mapping acid mine/fresh water sources acid mine/fresh water schema:name Detection of abandoned underground coal mines by geophysical methods en Get price

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geophysical method for coal exploration

geophysical methode for detecting coal - Crushing Plant Exploration geophysics the free 1 Geophysical methods 2 Us 21 Mineral exploration 22 【More】 Project Title: ASSESSMENT OF A GEOPHYSICAL COAL project title: assessment of a geophysical coal exploration method in a faulted terrane assessment of a geophysical coal Get price

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Archived: Locating and Characterizing Abandoned Mines

Geophysical Technologies for Detecting Underground Coal Mine Voids Forum July 28-30 2003 – Lexington Kentucky LOCATING AND CHARACTERIZING ABANDONED MINES USING MICROGRAVITY by Richard C Benson1 Ronald D Kaufmann1 Lynn Yuhr1 Richard Hopkins2 ABSTRACT Surface geophysical methods can be an important part of any site characterization effort Get price

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Characteristic of geological anomaly detected by combined

2 Combined geophysical detecting methods Currently many geophysical detection methods can be used in the laneway and the main methods include the elastic wave testing method the DC resistivity method the transient electromagnetic method and infrared detection etc Get price

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Magnetic and Gravity Methods in Mineral Exploration:

Mineral explorers rely on a wide range of geophysical techniques including magnetic gravity electrical electromagnetic and radiometric and above all on strong knowledge of hard-rock geology and on results of local field mapping and exploration drilling By itself no geophysical anomaly can simply be correlated with lithology (Lyatsky 2004) Get price

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Research on Ground of Penetrating Radar in the Coal Mine

Transient Electromagnetic Method (TEM) is the most popular geophysical method [4]–[7] for exploring geological structure in the coal tunnel it has a blind zone of 20 meters near the transmitter area [8] However the Ground Penetrating Radar (GPR) can overcome the two mentioned disadvantages of the geophysical method Get price

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Detection of Abandoned Underground Coal Mines by

The method may be most valuable in detecting clays and other highly conductive layers associated with the coal seam rather than by direct detection of underground cavities The best equipment used in the application of the method is at least one order of magnitude more sensitive than the equipment used in resistivity surveys Get price

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Detection of abandoned underground coal mines by

29-9-2019Acid drainage produced by abandoned coal mines continues to cause serious water pollution problems Without knowing the exact location of the concealed openings and the extent of the mine source abatement techniques are virtually impossible Drilling is the only known method Get price

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Magnetic Geophysical Method

INTRODUCTION Magnetic geophysical surveys measure small localised variations in the Earth's magnetic field The magnetic properties of naturally occurring materials such as magnetic ore bodies and basic igneous rocks allows them to be identified and mapped by magnetic surveys Get price

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Coal Exploration and Mining

COAL OIL SHALE NATURAL BITUMEN HEAVY OIL AND PEAT – Vol I-Coal Exploration and Mining - Lixun Kang Encyclopedia of Life Support Systems (EOLSS) Geophysical methods may also be used in conjunction with the down-hole logging methods The initial drilling program is often followed by further use of surfaceGet price

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GEOPHYSICAL METHODS FOR COAL FIRE DETECTION

Request PDF on ResearchGate | GEOPHYSICAL METHODS FOR COAL FIRE DETECTION AND MONITORING | Within the framework of the Sino-German research initiative Innovative technologies for exploration extinction and monitoring of coal fires in Northern China a number of different geophysical methods have been applied to determine their use on coal Get price

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Application of Geophysical Methods in Detecting Coal Mined

The paper based on the geophysical characters of the mined-out areas analyzes the principles of the three geophysical techniques which contain crosswell seismic ground penetrating radar(GRP) and TEM The method of crosswell seismic can be continuously measured to detect deep object and the technique of ground penetrating radar is widely applied Get price

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A method for detecting and locating geophysical events

3-2-2016We have developed a novel method to detect and locate geophysical events that makes use of any sufficiently dense sensor network This method is demonstrated using acoustic sensor data collected in 2013 at the USArray Transportable Array (TA) The Get price

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geophysical methode for detecting coal

geophysical equipment for coal finding - siculocks geophysical equipment for coal finding - The geophysical method is fast technique without damage during the detecting of geophysical equipment for coal finding Chat Now How To Find Coal Through Geophysics - testrigin geophysical equipment for coal finding Mobile Jaw Crusher PEW Jaw Get price

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Advanced forecast of coal seam thickness variation by

Advanced forecast of coal seam thickness variation by integrated geophysical method in Science and Engineering Advanced forecast of coal seam thickness variation by integrated geophysical method in the laneway Wang Bo a b 590-597 [10]F Tao Application of TEM in detecting goaf of coal mine with high-resistivity and shallow Get price

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Surface Geophysical Methods

This section provides an introduction to the many surface geophysical methods We have focused on considerations for their use and how to select methods rather than how to make the measurements In addition a large number of examples showing their application are provided to show how these methods can be used in a site characterization effort Get price

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Multi

Geophysical equipment on mobile loggers The system of geophysical logging has been integrated into the routine exploration programmes of the coal sector and presently a total of eight mobile geophysical loggers are used on a regular basis by CMPDI for logging of about 50 000 depth metres annually providing useful inputs to mine planning Get price

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Application of Comprehensive Geophysical Prospecting

4-4-2019And the distribution of mined-out areas and water accumulation in the coal mine are investigated in detail by using the comprehensive geophysical prospecting method of the transient electromagnetic method (TEM) and controlled source audio-frequency magnetotellurics (CSAMT) Get price

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CN103837897A

The invention provides a method for finely detecting slot waves of an underground coal mine and studies of propagation characteristics A controllable spread-spectrum focus or vibration source is adopted elastic waves or electromagnetic waves are transmitted to coal series rock stratums a multi-mode correlation receiving method is adopted Get price

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A method for detecting and locating geophysical events

3-2-2016We have developed a novel method to detect and locate geophysical events that makes use of any sufficiently dense sensor network This method is demonstrated using acoustic sensor data collected in 2013 at the USArray Transportable Array (TA) The Get price

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Detecting top of coal

The method of detecting Top of Coal while drilling brings significant benefits to surface mining operations including: Providing a reliable indication of approach to Top of Coal that will enable drilling to be stopped before touching coal or at a minimum standoff distance Increase production by reducing damage to coal from blasting Get price

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Geophysical Survey Equipment

GSSI provides ground penetrating radar equipment that offers a reliable accurate and nondestructive solution to geophysical mapping earth's subsurface Get price

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Geophysical Methods Exploration Geophysics Geology

The physical properties of rocks have been used to devise geophysical methods that are essential in the search for minerals (coal gas oil) Regional geological studies Seismic refraction method: In refraction method the detecting instruments recorded the arrival times of the seismic waves when refracted from the surface of Get price

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Coal Exploration and Mining

COAL OIL SHALE NATURAL BITUMEN HEAVY OIL AND PEAT – Vol I-Coal Exploration and Mining - Lixun Kang Encyclopedia of Life Support Systems (EOLSS) Geophysical methods may also be used in conjunction with the down-hole logging methods The initial drilling program is often followed by further use of surfaceGet price

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geophysical equipment for coal finding

geophysical methode for detecting coal - pakdhaorg geophysical equipment for coal finding - The geophysical method is fast technique without damage during the detecting of geophysical equipment for coal finding Chat Now How To Find Coal Through Geophysics - testrigin Get price

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ky0311

Geophysical Technologies for Detecting Underground Coal Mine Voids Lexington KY July 28-30 2003 APPLICATIONS OF THE ELECTRICAL RESISTIVITY METHOD FOR DETECTION OF UNDERGROUND MINE WORKINGS by William J Johnson – D'Appolonia Monroeville PA Introduction The need to understand the location of abandoned workings has recently been high Get price

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